Cultivator.



PATENTED MAR. 17, 1903.

s. H. & n. GARST.

GULTIVATOR.

APPLICATION FILED mm: 2, 1902.

2 BHEBTS -BHEET 1.

I0 MODEL.

PATENTED MAR. 17, 1903.

s. H. a; 1). GARST. GULTIVATOR.

APPLICATION FILED JUNE 2, 1902. H0 IODEL. 2 BHEETS-SEBBT 2.

UNITED. STATES ATENT FFICE.a

STEPHEN I-I. GARST AND DUDLEY GARST, OF DETROIT, MICHIGAN, ASSIGNORS TO AMERICAN HARROW COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

CULTIVATO R.

SPECIFICATION forming part of Letters Patent No. 722,690, dated March 17, l903.

Application filed June 2,1902. Serial No. 109,914. (No model.)

To all whom it may concern.-

Be it known that we, STEPHEN H. GARsT and DUDLEY GARST, citizens of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Cultivators, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention has reference generally to cultivators or harrows, and relates particularly to a spring-trip for the cultivator-tooth.

The invention consists in the peculiar construction of the trip mechanism and the novel arrangement and combination of the various parts thereof, as will be more fully hereinafter set forth and illustrated.

In the drawings, Figure 1 is a vertical central section through the spring-trip,the beam being shown in elevation and the parts being shown in dotted lines in the tripped position. Fig. 2 is a perspective view of the beam and trip. Fig. 3 is a section taken on line mm of Fig. 1. Fig. 4 is a perspective view of the casting forming part of the toggle, and Fig. 5 is a top plan view.

In the drawings thus briefly described the reference-letter A designates the cultivatorbeam or drag-bar, having the usual substantially horizontal portion B and the downwardly-extending portion C.

D is a toothcarrying member provided with a bifurcated shank E, which embraces the lower end portion of the beam and is pivoted thereto by a pin or bolt F.

F is a cross bar or brace for the shank ends, and G is a tooth which is secured to the lower portion of the member described by a bolt H.

I designates a double-toggle-lever connection between the upper end of the shank and the beam at a point above the shank. This connection comprises levers J and K, pivoted at two of their ends to the end portions of the shank, and levers'L and M, which are pivoted to the levers J and to a lug 0 upon the beam, as shown in Fig. 1. The levers Land M are preferably cast integral with a body P, the body, as shown, being bifurcated to embrace the lug O and pivoted thereto by the pin Q.

R is a projection extending from the body portion of the toggle connection.

T is a coil-spring secured at its upper end to a hook at upon said projection and connected at the lower end to a similar hook I). The latter hookis secured upon a bifurcated casting U, which embraces the beam at its lower end and is attached thereto intermediate of the shank members by the pivot F. v I To prevent the toggles from looking when the tooth is in its operative position, a stop is arranged upon one of the toggle-levers and adapted to strike against and arrest further movement of its complementary lever before the toggle-pivots are brought into alinement. The stop is shown in the form of flanges a a, preferably upon the sides of the levers L and M. These flanges or shoulders engage the edges of the levers J and K and prevent further movement of the toggle for the purpose set forth.

It will be obvious from the construction of the stop means that after the proper position upon the toggle is ascertained no adjustment of the stop is necessary. Consequently the stop may be a fixed stop and, if desired, cast upon the toggle, which simplifies its construction and reduces the cost materially.

In operation, the parts being as shown in Fig. 1, when the tooth meets with an obstruction the spring controlling the toggles is overcome and the tooth permitted to break back. Immediately after the obstruction is passed, however, the toggle is actuated by the coilspring and the tooth is returned to its initial position in readiness for further use. Attention is directed to the fact that by constructing the trip in the manner set forth the parts are so combined as to occupy a minimum amount of space. Furthermore, the togglespring is located immediately adjacent to the beam and to the rear of the latter, where it is protected from mud and dirt.

What we claim as our'in'vention is 1. The combination-with the beam, of a tooth-carrying member, a pivot connecting said member at a point intermediate of its ends to the beam, a toggle connection between the upper section of the tooth-carrying member and the beam, a hook member connected to the lower end of the beam by said pivot, and a spring connecting said hook member with the toggle.

2. The combination with the beam, of a tooth-carrying member, a pivot connecting said member intermediate of its ends to the beam, a toggle connection between the upper section of the tooth-carryin g member and said beam, an extension on said toggle, and a coilspring secured at one end to the extension and having connections at its opposite end with the beam in proximity to the pivot.

3. The combination with the beam, of a tooth-carrying member, a pivot connecting said member intermediate of its ends to the beam, a toggle connection between the upper section of the tooth-carrying member and said beam, a hook member secured to the beam at its lower end, and a coil-spring con meeting said hook member with the extension.

4. The combination with the beam, of a tooth-carrying member pivoted intermediate of its ends thereto, spring-actuated togglelevers connecting said member to the beam, and a stop upon one of the toggle-levers in operative relation to and adapted to abut against the other to limit its movement in one direction.

5. The combination with the beam, of a tooth-carrying member pivoted intermediate of its ends thereto, spring-actuated togglelevers, connecting said member to the beam, and a lug integral with one of the levers and constructed to'abut against the other to limit its movement in one direction.

6. The combination with the beam, of a tooth-carrying member having a bifurcated shank embracing and pivotally connected to the lower end of the beam, a toggle-lever connection between the upper end of the shank and the beam, an extension upon the toggle, a bifurcated hook member engaging the beam intermediate of the shank furcations and connected to the beam by the shank-pivot, and a spring connecting said hook member with the extension upon the toggle.

In testimony whereof we affix our signatures in presence of two witnesses.

STEPHEN H. GARST. DUDLEY GARST. Vitnesses: C. L. READ, A. STEWART. 

